Videos posted on You Tube of the huge back-to-school pool party in Fort Collins show a pool area packed with thousands of young people, drinking and dancing. The party — apparently an annual tradition held blocks from the Colorado State University campus — started around 1 p.m. but was busted by 3 p.m. It took until 5:45 for police to disperse the crowd, and these videos show you why:

And here’s the one-minute version:

These guys pass two police officers as they arrive. I’m guessing those cops are thinking “we’re going to need more cops.”